Summary Of Significant Accounting Policies (Restricted Stock And Options To Purchase Shares Of Common Stock Excluded From Calculation Of Diluted Earnings Per Share) (Details) - shares shares in Millions	12 Months Ended
	May 31, 2020	May 26, 2019	May 27, 2018
Accounting Policies [Abstract]
Anti-dilutive restricted stock and options (in shares)	2.0	0.3	0.3